Improved mode of covering steam-boilers



UNITED STATES PATENT OFFICE.

JOHN ASHUROFT, OF NEW YORK, N. Y.

IMPROVED MODE OF COVERING STEAM-BOILERS.

Specification forming part of Letters Patent No. 55,598. dated J une 19,1866.

To all whom, it may concern:

Be it known that I, J oHN AsncRoET, of the city, county, and State ofNew York, have invented a new and Improved Mode of CoveringSteam-Boilers with Felt or other Non- Oonductin g Material; and I dohereby declarethat the following is a' full and exact descriptionthereof, reference being had to the accompanying drawings, in which likeparts are indicated by like letters.

rIhe nature of my invention consists in lso covering a steam boiler orpipe with felt or any other non-conducting material that severaldesirable and important results may be obtained thereby, such aseconomy, the saving of trouble and loss of time, as also guard furtheragainst accidents from lire. To effect these purposes Ido not place myfelt or other non-conducting material directly upon the eX- teriorsurface of the boiler or pipe, for this destroys in a short time itsuseful function, to say nothing of other well-known objections; but I soarrange it that an air-space intervenes between the boiler and the feltby supporting the latter on a suitable frame-work surrounding the formerand a short distance from it.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

In the drawings, Figure l represents a side view of a boiler and asection of the felting, one-half of the latter being removed. Fig. 2represents a iront view of a boiler and a section of the feltingsurrounding the same. Figs. 3 and 4 represent, respectively,longitudinal and transvers sections of a steam-pipe, showing theapplication of my invention to it.

A shows an ordinary boiler, and B a steampipe; C, the ordinary felt orother non-conducting material used for covering these.

Instead of placing the felt directly upon the surface of boiler or pipe,I construct a metallic frame-work around each, removed a short distance,so that an air-space, D, intervenes between boiler or pipe and the felt.This framework E can be easily constructed or built up of wire, smalliron bars, gas-pipe,

(unwelded,) forming an open frame with meshes. The size of the metallicbars used or the size of the meshes must depend on the size of the.boiler or pipe, being a matter of mere judgment. This frame-work mustbe supported by suitable studs or struts d, and it can be constructed'insections, so as to be easily removed for any needed repairs to boiler.The felt can be secured to this frame-work in any suitable manner, andin a way that it, too, can be easily removed.

rIhe advantages of my invention are as follows: It saves the feltin g orother covering from being destroyed or injured by direct contact withthe surface of the boiler, which invariably happens when so applied. Theairspace between the heated surface of boiler and felt prevents a largeproportion of loss of heat by radiation, thereby reducing the quantityof fuel consumed. In case of repairs the covering can easily be removedand replaced without injury to it. The covering not being in directcontact with boiler, the danger from re is obviated. Such danger existsby the old application of the felt.

When animal-hair is used it is secured or applied (as usual) in canvas.

In case of a leak, in the ordinary application of felt, it is rotted bythe steam which escapes from the boiler. In my arrangement this isobviated to a great, if not entire, extent.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

Covering a steam-boiler pipe or other heater with felt` or othernon-conducting material, when the latter is supported on a frame-workremoved from and surrounding the former, not` being in direct contact,but having an airspace intervening between said felt and boilerpipe orother heater, constructed and operated substantially in the mannerdescribed, and for the purpose set forth.

JOHN ASHCROFT.

Witnesses:

S. S. FAHNEsTocK, A. G. KLINK.

